Children&#39;s toothbrush



FIG. 1 is a front elevation view of a children's toothbrush showing our new design;

FIG. 2 is a right side elevation view thereof, the left side elevation view being a mirror image of the right side elevation view seen herein in FIG. 2; and,

FIG. 3 is a back elevation view thereof. 

The ornamental design for a children's toothbrush, as shown and described. 